Remove unused methods in DefaultS3CrtClientBuilder (#3879)

Author: gosar

services/s3/src/main/java/software/amazon/awssdk/services/s3/internal/crt/DefaultS3CrtAsyncClient.java

@@ -119,34 +119,6 @@ public static final class DefaultS3CrtClientBuilder implements S3CrtAsyncClientB
         private URI endpointOverride;
         private Boolean checksumValidationEnabled;
 
-        public IdentityProvider<? extends AwsCredentialsIdentity> credentialsProvider() {
-            return credentialsProvider;
-        }
-
-        public Region region() {
-            return region;
-        }
-
-        public Long minimumPartSizeInBytes() {
-            return minimalPartSizeInBytes;
-        }
-
-        public Double targetThroughputInGbps() {
-            return targetThroughputInGbps;
-        }
-
-        public Integer maxConcurrency() {
-            return maxConcurrency;
-        }
-
-        public URI endpointOverride() {
-            return endpointOverride;
-        }
-
-        public Long readBufferSizeInBytes() {
-            return readBufferSizeInBytes;
-        }
-
         @Override
         public S3CrtAsyncClientBuilder credentialsProvider(
                 IdentityProvider<? extends AwsCredentialsIdentity> credentialsProvider) {